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02-01-2009, 11:39 PM
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#1 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Hard brake pedal
Newbie here. I just picked up a 72 C-10, V-8, swb, 2wd, automatic tranny. The brakes are hard. Was wondering if anybody can give me some insight as to what the problem or problems might be? Thanks in advance.
DZL1. |
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02-01-2009, 11:47 PM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Hard brake pedal
Welcome to the site...
Can you give us a little more info. Do you have power brake booster or is it manual brakes? Also, what do you mean by "hard?" Is the pedal hard to depress or is it just plain hard to stop the truck. |
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02-01-2009, 11:54 PM
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#3 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Re: Hard brake pedal
Thank you for the greeting. Unfortunately I'm not sure if power or manual. How can I tell? The brake pedal is hard to depress, therefore making it hard to stop. Thanks again.
DZL1. |
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02-01-2009, 11:56 PM
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#4 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Re: Hard brake pedal
Thanks, I will try that tomorrow, assuming they are power.
DZL1. |
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02-02-2009, 12:02 AM
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#5 |
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72 Chevelle Club
Join Date: Jun 2007
Location: Newton , Iowa
Posts: 2,052
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Re: Hard brake pedal
under the hood it will look like this if they are power pic.1 Non Power pic.2 Bob
__________________
I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker |
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02-01-2009, 11:50 PM
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#6 |
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72 Chevelle Club
Join Date: Jun 2007
Location: Newton , Iowa
Posts: 2,052
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Re: Hard brake pedal
First of all Welcome !!!Asuming they are power . First check the vac line to the booster and the elbow that goes in the booster you can check it by removing it and make sure air only goes through it one way . If this checks out I would say it's time for a new booster. Bob
__________________
I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker Last edited by Bob 68327; 02-01-2009 at 11:50 PM. |
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02-02-2009, 12:35 AM
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#7 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Re: Hard brake pedal
Great pics! Well that answers that question. I have power, and I will try your suggestion. Thanks.
DZL1. |
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02-02-2009, 08:45 PM
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#8 |
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72 Chevelle Club
Join Date: Jun 2007
Location: Newton , Iowa
Posts: 2,052
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Re: Hard brake pedal
Glad to help out .
__________________
I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker |
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02-03-2009, 12:14 PM
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#9 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Re: Hard brake pedal
Ok Bob, I removed the elbow from the booster and it has good vacuum. So by your assumption, i will need a new booster. Correct or could it be something else? Thanks.
DZL1. |
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02-03-2009, 02:52 PM
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#10 |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Hard brake pedal
Here's some thing you can try: http://www.mpbrakes.com/technical-su...ng-drum-02.cfm
There's a possibility that the master cylinder is defective or brakes contaminated. Eliminate all of the easyily checked/observed mechanical things first. Power boosters are expensive unless you can find one in a junkyard. Last edited by 68gmsee; 02-03-2009 at 02:54 PM. |
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02-03-2009, 03:09 PM
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#11 |
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Registered User
Join Date: Jun 2007
Location: Smyrna, GA
Posts: 709
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Re: Hard brake pedal
Dont buy anything new until you:
1 Check your brake fluid level (1/4" below top) 2 inspect your brakes / pads / adjust your drums 3 inspect your brake lines for leaks and cracking 4 inspect your vacum line from the brake booster to your manifold for cracks / leaks. 5 bleed your brake system. These are all things that you need to do b/f you go out buying new parts...plus it's the cheapest way to locate your issue. I had this same problem last week. We bled the brakes...not the problem. I then changed my vacum line to the brake booster and applied gasket sealer where the check valve (elbow that you spoke of) inserts into the brake booster. I then adjusted my brakes (drums). Problem solved. Hope this helps!
__________________
Rottenwood Garage 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun |
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02-03-2009, 08:05 PM
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#12 |
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One day.....
Join Date: Aug 2008
Location: Ocala, FL.
Posts: 702
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Re: Hard brake pedal
Thank you guys for taking the time to answer my question. Orange Crush, my fluid level is lower than what you suggest, will fill. Brake lines are not cracked. will inspect brake pads. Vacuum line is fine. Will check vacuum pressure.
68gmsee, thanks for the link. My 72 has disc front and drum rear. I'm assuming the suggestions on that link will work on disc. It stated drum front and rear. Thanks again guys. DZL1. |
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